Schema-First

Validate and convert OpenAPI specification via Marshmallow schemas to Marshmallow schemas.

Schema-First

Features

OpenAPI specification validate.
Convert OpenAPI schemas to Marshmallow schemas.

Installation

Recommended using the latest version of Python. Schema-First supports Python 3.14 and newer.

Install and update using pip:

$ pip install -U schema_first

Example

Create specification - openapi.yaml:

openapi: 3.1.1
info:
    title: Example API for testing Flask-First
    version: 1.0.1
paths:
    /endpoint:
        get:
            operationId: endpoint
            responses:
                '200':
                    content:
                        application/json:
                            schema:
                                properties:
                                    message:
                                        type: string
                                type: object
                    description: OK

Create script - main.py:

from pathlib import Path
from pprint import pprint

from schema_first.specification import Specification

spec_file = Path('openapi.yaml')
spec = Specification(spec_file)
spec.load()

pprint(spec.reassembly_spec)
print(
    'Marshmallow schema generated from OpenAPI schema',
    spec.reassembly_spec['paths']['/endpoint']['get']['responses']['200']['content'][
        'application/json'
    ]['schema'],
)

More example see to ./example folder.

Additional documentation

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

schema_first-0.14.6.tar.gz (14.5 kB view details)

Uploaded Jul 29, 2026 Source

Built Distribution

If you're not sure about the file name format, learn more about wheel file names.

The dropdown lists show the available interpreters, ABIs, and platforms. Enable javascript to be able to filter the list of wheel files.

schema_first-0.14.6-py3-none-any.whl (23.5 kB view details)

Uploaded Jul 29, 2026 Python 3

File details

Details for the file schema_first-0.14.6.tar.gz.

File metadata

Download URL: schema_first-0.14.6.tar.gz
Upload date: Jul 29, 2026
Size: 14.5 kB
Tags: Source
Uploaded using Trusted Publishing? No
Uploaded via: twine/6.2.0 CPython/3.14.6

File hashes

Hashes for schema_first-0.14.6.tar.gz
Algorithm	Hash digest
SHA256	`ad03954354c34da24cf8655b717d3796e79d76e41475acc7676c212828a1746c`
MD5	`a374df86f2302ffafac81a95c5c02f87`
BLAKE2b-256	`d5e4bd14031d580f15c58873fb37e1d77d6ab276c6d9ce25aa14ce802c08ac18`

See more details on using hashes here.

File details

Details for the file schema_first-0.14.6-py3-none-any.whl.

File metadata

Download URL: schema_first-0.14.6-py3-none-any.whl
Upload date: Jul 29, 2026
Size: 23.5 kB
Tags: Python 3
Uploaded using Trusted Publishing? No
Uploaded via: twine/6.2.0 CPython/3.14.6

File hashes

Hashes for schema_first-0.14.6-py3-none-any.whl
Algorithm	Hash digest
SHA256	`7e145e70b875925e983320c502da6d297aa5467bf5c60deae915fc8b9822514f`
MD5	`b0ab8c322bdfceaa2d19f9e2c2c45949`
BLAKE2b-256	`cfff8fd82f5c8cb7a8ce77c22db39d586e220c1fb75ab0917550cbff5d41d29c`